Whipstock



2 Sheets-Sheet l wuwnto'm F. KINZBACH ETAL WHIPSTOCK Original Filed Oct. 27,- 1928 ESV l/ 0| A. al. d a lk\ j l! o W Tw/ l I Z Aug. 4, 1931.

Aug. 4, 1931. F. KlNzBAcH ET Al. 1,816,856

WHIPSTOCK Original Filed Oct. 2,7. 1928 2 Sheets-Sheet 2 4MM www Patented ug. 4, 1931 lUNITED STATES PATENT i OFFICE FRANK KIN'ZBACH, 0F HOUSTON, AND HARVE M. WHEELER, OF HUMBLE, TEXIAS 'WHIPSTOCK Application led October 27, 1928, Serial No. 315,378. Renewed February 6, 1931.

This invention relates to new and useful im rovements in a whip stock.

gne object of the invention is to provide a whip stock, of the character described,

erpipped with novel means for locating the w ip stock at any desired point, in a pipe to be perforated and side tracked, in a well bore, and for fixing the whip stock at the point where it is located.

Another object of the invention is to provide means through which the whip stock may be accurately located, with reference to the pipe joints, and fixed to the pipe, at such location that the milling tool which is used to co-operate with the whip stock will perforate'the pipe above, and not through the adjacent pipe joint.

A further feature of the invention is to provide a whip stock that is equipped with novel means which are normally inactive while the whip stock is being lowered into the pipe to be perforated, but which may be actuated into active, or pipe engaging position, to anchor the whip stock at a selected place in said pipe.

With the above and other objects in view this invention has particular relation to certain novel features of construction, op-

y eration and arrangement of parts an eX ample of which is given in this specification and illustrated in the accompanying drawings, wherein Figure l shows a fragmentary side elevation of the whip stock located in the pipe to be perforated and shown partly in section.

Figure 2 shows a vvertical sectional view of the lower end of the whip stock showing the anchoring means in active position.

Figure 3 shows a side elevation thereof.

Figure et shows a side elevation thereof viewed from the opposite side from that shown in Figure 3.

Figure 5 shows a fragmentary vertlcal sectional view showing the anchoring means in inactive position.

Figure 6 shows a cross sectional view taken on the line 6-6 of Figure 2.

Referring now more particularly to the drawings, wherein like numerals of reference designate vsimilar parts in each of the figures the numeral l designates a pipe set in a well bore. l

ln drilling wells it sometimes becomes impossible to continue down through and beneath the pipe set in the bore, for various reasons, and in such case it is common practice to locate a whip stock in the pipe and then by the use of a milling tool, which co-operates with the whi stock, in the well known manner, to perfdrate the pipe so that the drilling tools may work through said perforation and sidetrack the old bore beneath.

In locating said whip stock it has been the custom to attach 'the whip stock to the upper end of a supporting string of pipe and then let said string down into the bore until its lower end rests on bottom. The whip stock herein described is so designed that it may be set and anchored at a selected place in the pipe to be perforated without the use of said supporting string, said setting and anchoring means being of such construction that the whip stock will always be so located, with reference to a collar, connecting the pipe sections, that the perforation will be made at a distance from the collar to the end that said collar will not have to be cut through in making the perforation.

The numeral 2 designates the lower cylindrical end of the whip stock one side of which has an elongated vertical dovetailed groove. Fitted into said slot there is a channel shaped anchor 4 and a long outwardly curved dog 5 has its lower end pivoted between the lower ends of the side ianges 6, G of this anchor. This dog is seated on a coil spring f7 which is interposed between the dog and anchor, and which holds, the free end of the dog out against the inside ofthe pipe l as hereinafter explained.

Opposite the groove 8 the end 2 of the whip stock has an upwardly and outwardly inclined bearing face 8 which has a longitudinal dovetailed groove 9 therein and a tapering jaw 10 is slidable on said face and has a Adovetailed tenon 11 which fits into said groove. The outer side of this jaw is toothed so as to engage the pipe l.

Beneath the bearing face. 10 the lower end of the whip stock has a vertical bore 12 whose lower end is closed b the plug 13 on which is seated a-coil spring 14.

Attached to the lower end of the jaw 10 there is a rod 15 whose lower end has an enlarged head 16 which rests on the upper end of the spring 14.

`The inner side of the rib 11 has a concaved recess 17 and there is a transverse lock pin 18 slidable in a, transverse bearing in the end 2 one end of which is oval and fits into the recess 17 to hold the jaw 10 down in inactive position with the spring 14 under compression. In the groove 3 there is a slidable retaining block 19 against which the other end of the lock pinrests and this block is normally held in retaining position by 'the friction of said pin against said block said friction being caused by the upward pressure of the jaw against the oval end of said pin.

The upper end of said block 19 has an inside notch 20 for a purpose Ito bev hereinafter disclosed. The upper end 21, of the whip stock, as shown, is hinged to the lower end so as to add flexibility to the implement and to enable it to conform, to a certain degree, to a crooked pipe. The invention, however, comprehends the use of the improved setting and locking device in any type of whip stock. The upper end 21 is, tapered or wedged shaped, thus presenting 'a sloping face 22, to the milling tool, said sloping face being preferably concaved from end to end.

'A tubing 23 may be employed to lower and set the whip stock. The lower end of this tubing is attached to the upper end of the whip stock by means of a bolt 24 which is' sufficient to sustain the weight of said whip stockbut which will shear when subjected to additional strain. Through the tubing 23 the implement may be lowered to the desired point in the pipe 1. Before lowering, the jaw 10 should be locked in lower or inactive position by means of the pin 18. As the whip stock is lowered the free end of the dog 5 will ride against the inner side of the pipe 1 and the anchor 4, to which said dog is attached, will be held spaced above the block 19 by means of a suspending spring 25 which is housed in the bore 26 and whose lower end is attached v to the dog anchor 4 with its upper end at- "`tached to the cross pin 26 at the upper end o said /ore.

fV'herf) the selected place to anchor the whiip stock has been reached the tubing 23 mayl be elevated carrying the whip stock with, it, until the free end o f the dog 5 engages in the joint above,y connecting sections of the pipe 1, as shown in Figure 2, and

stopping the upward movement of the anchor 4 and a further upward pull willoperate to move the whip stock, and block 19 with it, upwardly until the upper end of said block strikes the lower end ofthe an chor 4 thus stopping the upward movement of said block as the whip stock moves on up the pin 19 will register with notch 2O and the pressure of the spring 14 will force the jaw l() upwardly and drive the pin 19 backwardly so as to clear said jaw and the jaw will be forced upwardly and outwardly into engagement with the pipe 1.

. The tubing 23 is then forced downwardly to shear ythe bolt 24 and said tubing may be removed.

A milling tool may then be lowered into the pipe 1 until it wedges between the face 22 and the opposing wall of the pipe 1 and then rotated until said. pipe is perforated and. an opening thus provided through which the drilling tool may work for sidetracking the bor f In anchoring the whip stock after the dog 5 has engaged in the joint the whip stock must be elevated as explained, in order to trip and set the jaw 10 and this carries the sloping face 22 a sufficient distance above the said joint so that the millingtool will not have to cut through the coupling 27 ,v.

connecting the sections of the pipe 1, in making said perforation. The range of movement, given to the dog anchor 4, ,without tripping the jaw releasing mechanism also lessens the likelihood of a premature releasing of said jaw 10 while moving the whip stock and locating it at the selected position.

While we have shown what we now consider the preferred form of the invention it is obvious that mechanical changes may be made and equivalents substituted for the parts shown and we reserve the right to make such changes as may be comprehended within the principle of the invention.

What we claim is A 1. The combination with a whip stoc adapted to be inserted into a pipe in a well bore, of means adapted to engage the pipe to anchor the whip stock against downward movement in the pipe, said means comprising a yieldably mounted pipe engaging jaw, releasable means for locking said jaw in inactive position out of engagement with the pipe, a slidably mounted dog anchor, a dog adapted to engage an inside shoulder in said pipe and hold said anchor stationary upon upward movement of the whip stock said anchor forming an abutment effective to being movable into active position in engagement with the pipe and into inactive position, releasable means normally holding said jaw .in inactive position, a slidably mounted dog anchor carried by the whip stock, a yieldably mounted dog thereon adapted to engage a projection in the pipe, upon upward movement of the Whip stock therein, and hold said anchor stationary said anchor forming an abutment adaptedl to `engage and release said releasable means to permit the jaw to move into said active position.

3. The combination with a whip stock adapted to be inserted into a pipe in a Well bore said pipe having joints, of a jaw carried by the Whip stock adapted to engage with said pipe said jaw being movable into active position in engagement'with the pipe and ,into inactive position, releasable means normally holding said jaw in inactive position, a slidably mounted dog anchor carried by the Whip stock, a yieldably mounted dog thereon adapted to engage in a joint of the pipe, upon upward movement of the Whip stock therein, and hold said anchor stationary said anchor forming an abutment adapted to engage and release said releasable means to permit the jaw to move into said active. position, and means for moving said jaw into such active position when so released.

4. A whip stock having a pipe engaging jaw thereon movable into active and inactive positions, releasable means for holding said jaw in inactive position, means tending to move the jaw into active position, said releasable means including a slidable pin in engagement with said jaw and a slidable retainer holding said pin in such engagement, a dog' anchor movable independent of said retainer and adapted to abut and move the retainer out of engagement with said pin, and engaging dog mounted on said anchor and through which said anchor may be moved into engaging relation with said retainer. i

5. A Whip stock having a pipe engaging jaw thereon movable into active and inactive positions, releasable means for holding said jaw thereon movable into active and inactive positions, releasable means for holding said jaw in inactive position, means tending to move the jaw into active position, said releasable means including a releasable locking member in engagement with said jaw and a releasable retainer holding said member in such engagement, a dog anchor movable independent of said retainer and adapted to abut and move the retainer out of engagement With said member, and engaging dog mounted on said anchor and through which said anchor may be moved into engaging relation with said retainer, a yieldable seat against which said dog is seated and a yieldable member suspending said anchor. In testimony whereof We have signed our names to this specification.

FRANK KINBACH. HARVE M. WHEELER.

jaw in inactivo position, means tending to move the jaw into active position, said releasable means including. a slidable pin in'n engagement With said jaw and a slidable retainer holding f said pin in such engagement, a dog anchor movable independent of said retainer and adapted to abut and move the retainer out of engagement with said pin, and engaging dog mounted on said anchor and through which said anchor may be moved into engaging relation with said retainer, and a .yieldable a.. member normally holding said anchor spaced from said retainer.

6. A whip stock having a pipe engaging 

